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Radio Properties of GPS and CSS Sources: Galaxies versus Quasars

Published online by Cambridge University Press:  05 March 2013

Carlo Stanghellini
Carlo Stanghellini*
Affiliation:
Istituto di Radioastronomia del CNR, Contrada Renna, Noto, Italy, I-96017. [email protected]
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Abstract

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On the basis of the different radio properties (especially different radio morphologies) between GPS galaxies and GPS quasars, I suggest that GPS galaxies are a more homogeneous class mainly consisting of compact symmetric objects, while the majority of GPS quasars are an intrinsically different type of radio source, similar to the common flat spectrum radio sources. For CSS radio sources the difference between galaxies and quasars is less evident. This is interpreted as a bias correlated with size: samples of smaller objects are more likely to be contaminated by unrelated objects. This is consistent also with the high percentage of blazar/quasar objects present in a sample of the even smaller HFP radio sources.

Keywords

galaxies: activegalaxies: evolutionquasars: generalradio continuum: galaxies
Type
GPS/CSS Workshop
Information
Publications of the Astronomical Society of Australia , Volume 20 , Issue 1 , 2003 , pp. 118 - 122
Copyright
Copyright © Astronomical Society of Australia 2003

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